The deal Gov. Paterson announced to save the beleaguered Off-Track-Betting Corp. includes a provision that could cost New York City taxpayers as much $200 million, Mayor Bloomberg fumed yesterday.

Although it was never mentioned in the state’s press release on restructuring OTB, Bloomberg said the plan assumes the city will pay the cost of the agency’s retiree health benefits, estimated at between $100 million and $200 million.

“The plan requires legislative and legal approvals, and we are going to fight, using all available options, to insure it does not become reality,” Bloomberg said.

The state agreed to take over money-losing OTB from the city two years ago after Bloomberg warned he’d shut down the agency rather than use taxpayer funds to prop it up.

City officials insisted that meant the health costs were Albany’s responsibility.

They pointed to a statement issued on June 13, 2008, by Paterson’s then-press secretary, Risa Heller, that said bluntly that the state “will assume both the assets and liabilities” of the bookie operation.

The mayor’s office “should reserve judgment until they have been fully informed about the details,” said Paterson spokesman Morgan Hook.